Chains and heterogens:
PDB Chain Sequences:
>1sirA (A:) rpefdwqdplvleeqlttdeilirdtfrtycqerlmprillanrnevfhreiisemgelg vlgptikgygcagvssvaygllarelervdsgyrsamsvqsslvmhpiyaygseeqrqky lpqlakgellgcfgltepnsgsdpssmetrahynssnksytlngtktwitnspmadlfvv warcedgcirgfllekgmrglsapriqgkfslrasatgmiimdgvevpeenvlpgasslg gpfgclnnarygiawgvlgasefclhtarqyaldrmqfgvplarnqliqkkladmlteit lglhaclqlgrlkdqdkaapemvsllkrnncgkaldiarqardmlggngisdeyhvirha mnleavntyegthdihalilgraitgiqaftask
>1sirA (A:) efdwqdplvleeqlttdeilirdtfrtycqerlmprillanrnevfhreiisemgelgvl gptikgygcagvssvaygllarelervdsgyrsamsvqsslvmhpiyaygseeqrqkylp qlakgellgcfgltepnsgsdpssmetrahynssnksytlngtktwitnspmadlfvvwa rcedgcirgfllekgmrglsapriqgkfslrasatgmiimdgvevpeenvlpgasslggp fgclnnarygiawgvlgasefclhtarqyaldrmqfgvplarnqliqkkladmlteitlg lhaclqlgrlkdqdkaapemvsllkrnncgkaldiarqardmlggngisdeyhvirhamn leavntyegthdihalilgraitgiqafta